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<h3><a href="index.html">Table Of Contents</a></h3>
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<li><a class="reference internal" href="#">Transforms</a><ul>
<li><a class="reference internal" href="#default-transforms">Default Transforms</a></li>
<li><a class="reference internal" href="#creator-defined-transforms">Creator-Defined Transforms</a></li>
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<div class="section" id="transforms">
<span id="id1"></span><h1>Transforms<a class="headerlink" href="#transforms" title="Permalink to this headline">¶</a></h1>
<p>A transform can be applied to a displayable to yield another
displayable. The built-in transforms are used to control where an
object is placed on the screen, while user-defined transforms
can cause more complex effects, like motion, zoom, and rotation.</p>
<p>Transforms can be applied by giving the at clause to the scene and
show statements. The following code applies the "right" transform to
the eileen happy displayable.:</p>
<div class="highlight-renpy"><div class="highlight"><pre><span class="k">show</span> <span class="n">eileen</span> <span class="n">happy</span> <span class="k">at</span> <span class="n">right</span>
</pre></div>
</div>
<p>Multiple transforms can be applied by separating them with commas. These
transforms are applied from left-to-right, with the rightmost
transform taking precendece in the case of conflicts.</p>
<div class="highlight-renpy"><div class="highlight"><pre><span class="k">show</span> <span class="n">eileen</span> <span class="n">happy</span> <span class="k">at</span> <span class="n">halfsize</span><span class="p">,</span> <span class="n">right</span>
</pre></div>
</div>
<p>A displayable always has a transform associated with it. If no
transform is given, the prior transform is used. When the transform is
changed, undefined values are taken from the prior transform, or from
<tt class="docutils literal"><span class="pre">default</span></tt> if there is no prior transform.</p>
<div class="section" id="default-transforms">
<h2>Default Transforms<a class="headerlink" href="#default-transforms" title="Permalink to this headline">¶</a></h2>
<p>Ren'Py ships with a number of transforms defined by default. These
transforms position things on the screen. Here's a depiction of where
each default transform will position an image.</p>
<div class="highlight-renpy"><div class="highlight"><pre><span class="o">+-----------------------------------------------------------+</span>
<span class="o">|</span><span class="n">topleft</span><span class="p">,</span> <span class="n">reset</span> <span class="n">top</span> <span class="n">topright</span><span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="n">truecenter</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span> <span class="o">|</span>
<span class="o">|</span><span class="n">left</span> <span class="n">center</span><span class="p">,</span> <span class="na">default</span> <span class="n">right</span><span class="o">|</span>
<span class="o">+-----------------------------------------------------------+</span>
</pre></div>
</div>
<p>The offscreenleft and offscreenright transforms position images off the
screen. These transforms can be used to move things off the screen
(remember to hide them afterwards, to ensure that they do not consume
resources).</p>
<p>The transforms are:</p>
<dl class="var">
<dt id="var-center">
<tt class="descname">center</tt><a class="headerlink" href="#var-center" title="Permalink to this definition">¶</a></dt>
<dd><p>Centers horizontally, and aligns to the bottom of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-default">
<tt class="descname">default</tt><a class="headerlink" href="#var-default" title="Permalink to this definition">¶</a></dt>
<dd><p>Centers horizontally, and aligns to the bottom of the screen. This
can be redefined to change the default placement of images shown
with the show or scene statements.</p>
</dd></dl>
<dl class="var">
<dt id="var-left">
<tt class="descname">left</tt><a class="headerlink" href="#var-left" title="Permalink to this definition">¶</a></dt>
<dd><p>Aligns to the bottom-left corner of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-offscreenleft">
<tt class="descname">offscreenleft</tt><a class="headerlink" href="#var-offscreenleft" title="Permalink to this definition">¶</a></dt>
<dd><p>Places the displayable off the left side of the screen,
aligned to the bottom of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-offscreenright">
<tt class="descname">offscreenright</tt><a class="headerlink" href="#var-offscreenright" title="Permalink to this definition">¶</a></dt>
<dd><p>Places the displayable off the left side of the screen,
aligned to the bottom of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-reset">
<tt class="descname">reset</tt><a class="headerlink" href="#var-reset" title="Permalink to this definition">¶</a></dt>
<dd><p>Resets the transform. Places the displayable in the top-left
corner of the scren, and also eliminates any zoom, rotation, or
other effects.</p>
</dd></dl>
<dl class="var">
<dt id="var-right">
<tt class="descname">right</tt><a class="headerlink" href="#var-right" title="Permalink to this definition">¶</a></dt>
<dd><p>Aligns to the bottom-right corner of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-top">
<tt class="descname">top</tt><a class="headerlink" href="#var-top" title="Permalink to this definition">¶</a></dt>
<dd><p>Centers horizontally, and aligns to the top of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-topleft">
<tt class="descname">topleft</tt><a class="headerlink" href="#var-topleft" title="Permalink to this definition">¶</a></dt>
<dd><p>Aligns to the top-left corner of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-topright">
<tt class="descname">topright</tt><a class="headerlink" href="#var-topright" title="Permalink to this definition">¶</a></dt>
<dd><p>Aligns to the top-right corner of the screen.</p>
</dd></dl>
<dl class="var">
<dt id="var-truecenter">
<tt class="descname">truecenter</tt><a class="headerlink" href="#var-truecenter" title="Permalink to this definition">¶</a></dt>
<dd><p>Centers both horizontally and vertically.</p>
</dd></dl>
</div>
<div class="section" id="creator-defined-transforms">
<h2>Creator-Defined Transforms<a class="headerlink" href="#creator-defined-transforms" title="Permalink to this headline">¶</a></h2>
<p>A creator can define a transform using the
<a class="reference internal" href="atl.html#atl"><em>animation and transformation language</em></a>, or the
<a class="reference internal" href="trans_trans_python.html#Transform" title="Transform"><tt class="xref py py-class docutils literal"><span class="pre">Transform</span></tt></a> function.</p>
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